1880. ] 
DICIvSONIA BERTEROANA. 
117 
Dicksonia Berteroana. 
tripinnate, the pinnse oblong-lanceolate, 12 in. 
to 15 in. long, and 5 in. to G in. broad, the 
pinnules sessile, lanceolate, and the segments 
close-set; those of the sterile fronds are 
nearly entire, and those of the fertile ones 
deeply pinnatifid, both surfaces being green 
and glabrous. The sori are six to eight in 
number on the lower segments, which they 
nearly cover, the midrib and tip only being 
exposed. 
In the young state, the plant is also of ele¬ 
gant and symmetrical growth, and the fronds 
gradually assume the general characteristics of 
those of the mature plants. Even at this 
stage the thick and leathery texture of the 
fronds becomes obvious. These several features 
render it both a useful and a pleasing addition 
to our conservatory and greenhouse arborescent 
ferns, amongst which, on account of its firm 
and durable texture, it retains its verdure for 
